If you have an ancient vintage binary-programmable scanner such as an Electra Bearcat 101, Radio Shack Realistic COMP-100, Regency "Whammo" ACT-W10, SBE "OPTI-SCAN" SBE12SM, or Tennelec MS-1 or MS-2? You may want to order a copy of the appropriate manual. Click here for PROGRAMMING MANUALS.

Specify RADIO make & modelthat you plan to use the crystals inso we can send the right crystals for your unit

Interchangability of Scanner Crystals "Regency/Realistic" & "Bearcat" crystals are not the same; however you can use BC (10.8MHz IF) crystals in place of TMR (10.7MHz IF) crystals (& vice-versa) when you consider the IF frequency to determine what frequency it would receive in a different brand scanner: